大地组
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然而,充分互联的拓扑结构也较大地限制了核心组的可伸缩性。
However , the fully interconnected topology imposes restrictions on core group scalability .
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大地卫星技术工作组
Landsat Technical Working Group
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所以大地基准面定义了一个椭球面,并通过大地上的一组测量点与这个椭球面关联起来,从而定义了地球的中心。
So the datum defines an ellipsoid and through the use of a set of points on the ground that we relate to points on the ellipsoid , we define the center of the Earth .